BronchiolitisBronchitisBronchiolitis, ViralBronchiolitis ObliteransBronchitis, ChronicInfectious bronchitis virusCryptogenic Organizing PneumoniaLung TransplantationRespiratory Syncytial Virus InfectionsRacepinephrineRespiratory Syncytial VirusesRespiratory Syncytial Virus, HumanRespiratory SoundsChronic DiseaseLungAcute DiseaseCoronavirus InfectionsRespiratory Function TestsBronchopneumoniaRespiratory Tract InfectionsCoronaviridaeCoughRespiratory Tract DiseasesAsthmaBronchodilator AgentsBronchiRespirovirus InfectionsFlavoring AgentsBronchoalveolar Lavage FluidInfant, NewbornSputumAirway ObstructionLung DiseasesCollagen Type VHospitalizationForced Expiratory VolumeNebulizers and VaporizersLung Diseases, ObstructivePneumonia, ViralPulmonary EmphysemaTransplantation, HeterotopicTracheaHeart-Lung TransplantationBronchiectasisOxygen Inhalation TherapyMetapneumovirusCroupVital CapacityPneumoniaGraft RejectionAlbuterolPoultry DiseasesBronchoscopyExpectorantsRespiratory AspirationSpirometrySmokingAdministration, InhalationIpratropiumParamyxoviridae InfectionsEmphysemaPulmonary Disease, Chronic ObstructiveHeliumSeverity of Illness IndexAzithromycinNasal Lavage FluidAtropine DerivativesProspective StudiesAnti-Bacterial AgentsPulmonary Heart DiseaseTracheitisRisk FactorsFollow-Up StudiesBiopsyAdrenal Cortex HormonesRetrospective StudiesNasopharynxEosinophiliaRespiratory MucosaRespiratory SystemRadiography, ThoracicSaline Solution, HypertonicNasopharyngitisGuadeloupeBronchiolesLung Diseases, InterstitialBronchial DiseasesDouble-Blind MethodAerosolsRhinovirusCoronaviridae InfectionsBronchoalveolar LavageRespiratory RateMediastinal EmphysemaOccupational DiseasesAdenoviridae InfectionsPulmonary FibrosisTomography, X-Ray ComputedTransplantation, HomologousMustard Gas